The Pirate Bay is probably the best known BitTorrent brand on the Internet. The site was founded in 2003 and is still expanding, despite the immense legal witch hunt launched by the entertainment industries several years ago.

Alexa Rank: 164 / Compete Rank: 927 / Last year #2

Last year was a tough one for isoHunt, as it became the first search engine that had to implement a keyword filter provided by the MPAA. Despite this setback, isoHunt is still the third largest torrent site in terms of traffic. In 2011, isoHunt hopes to get rid of the filter through the Appeals Court.

Alexa Rank: 194 / Compete Rank: 2,154 / Last year #3

KickassTorrents was the fastest growing newcomer of last year, and managed to continue this upward trend throughout 2010. The site released many new features and continues to innovate, still without a single banner ad on the site.

Alexa Rank: 289 / Compete Rank: 897 / Last year #11

BTjunkie had a pretty quiet year, which is usually good news for a site that operates in the BitTorrent niche. The only setback was the removal of the site’s front page from Google due to a DMCA complaint. As last year, BTjunkie settles in fifth place.

Alexa Rank: 299 / Compete Rank: 987 / Last year #5

The impossible happened. Demonoid finished 2010 with only a minimal amount of downtime, compared to weeks or months in previous years. A few weeks ago the site announced that it would move from the familiar .COM to a .ME domain in response to the news about US domain seizures.

Alexa Rank: 736 / Compete Rank: 1,119 / Last year #7

TorrentReactor fooled most of the tech press last year when it announced that it had bought a Russian town, one of the better PR stunts seen in 2010. On the flipside TorrentReactor seems to have lost some traffic due to a Google penalty, dropping the site to 9th place this year.

Alexa Rank: 1,088 / Compete Rank: 1,972 / Last year #6

LimeTorrents is the best newcomer of 2010 in terms of traffic, which promises a lot for the new year. The site went live half a year ago and already made it into the top 10 in this short period. It’s also a bit ironic as ‘Limewire’ got shutdown a few months ago.

Isohunt.com In a shocking turn of the tables this September, the Isohunt webmaster is counter-suing the Canadian music industry. He is claiming that previous copyright violation suits against him were unfounded, and that he is entitled to have his legal expenses recovered. Read the entire story at http://www.isohunt.com.

Demonoid.com is back online! After legal conflicts in April of 2008, they have reestablished themselves outside of the USA. Demonoid is still a private community, and members are held liable for any leeching that their invited friends do in this community. If you are lucky enough to get a Demonoid membership, invite your friends carefully, lest you lose your own membership.

Mininova.org Mininova is the successor to Suprnova, one of the original big torrent databases of the Web.

YouTorrent.com Still in beta testing format, this new torrent site claims to be the largest legal torrent search engine today. Accordingly, the result sets are much smaller than the “pirate” counterparts, but definitely try this site for yourself.

Torrentbox.comFYI: like Isohunt, Torrentbox is being sued by the MPAA as of February 28, 2006. The days for this fine search engine may be numbered.

Torrentreactor.to (Torrentreactor has made a comeback from a hijacking and an uncooperative hosting service. They have moved to a different server setup and a Tonga country domain outside the USA. Read the details on their home page.)

TorrentTyphoon.com(this database is up for sale, if anyone is interested in running a torrent service)

Torrentspy.com March 24, 2008: Torrentspy has voluntarily closed its doors. Instead of conforming to the American court mandates to change their privacy policies, the Torrentspy team has opted instead to cease operations. A sad day for downloaders everywhere.

Special mention: NowTorrents.com (A clean and fast user interface, and some great cross-reference linking helps you browse books and other media related to your movies.)

Special mention: ShareTV.org (ShareTV is dedicated to sharing television episodes and entire TV series. Find “24”, “Heroes”, and “Lost” episodes here. Special thanks to Chris R. for telling us about his web site.)

Special mention: Torrent-Finder.com (This site has been submitted recently by three readers as their personal favorite torrent search engine. It “meta-searches” 159 torrent sites as of this writing. Special thanks to Dina, Suresh, and ChaOSthEory for this submission.)

BitTorrent meta-search engines can be a great and easy way to find torrents. However, they are useless if all the sites they index host the same .torrent files. So, no matter how useful these site may seem, they are pretty much useless if there are no trackers.

BitTorrent’s popularity is growing every day. Despite efforts from anti-piracy outfits such as the MPAA and IFPI, torrent sites continue to grow traffic wise, and there is no sign that this trend will be brought to a halt anytime soon.

We decided to compile a list of the 25 most popular BitTorrent sites, and see how their (relative) popularity has grown over the past three months. Out of the 25 sites in the list, 21 improved their ranking in Alexa’s list of most popular sites on the Internet.

There are a few changes in the top 10 compared to the list of 2007’s top torrent sites. Mininova is still leading the bunch, but The Pirate Bay is now in second place, in front of isoHunt. Torrentportal and TorrentReactor traded places as well, the sites are now 7th and 9th respectively.

YouTorrent is the only newcomer, and it’s really impressive that the site made it into the top 25 only 2 months after its launch.

Note: Alexa’s data gathering is not perfect. The exact figures may be not be completely accurate, but it is a great tool (especially the traffic rank) to compare sites within the same niche and to get a global impression of traffic shifts over time.